if (res == 1) {
   document.write("<LINK rel=stylesheet href=\"locaties_css/avenue1.css\" type=\"text/css\">"); }

else if (res == 2) {
   document.write("<LINK rel=stylesheet href=\"locaties_css/avenue2.css\" type=\"text/css\">"); }

else if (res == 3) {
   document.write("<LINK rel=stylesheet href=\"locaties_css/avenue3.css\" type=\"text/css\">"); }

else if (res == 4) {
   document.write("<LINK rel=stylesheet href=\"locaties_css/avenue4.css\" type=\"text/css\">"); }

else if (res == 5) {
   document.write("<LINK rel=stylesheet href=\"locaties_css/avenue5.css\" type=\"text/css\">"); }